Presence of aerenchyma in the leaves, stem and roots of plants is an anatomical adaptation inI. hydrophytesII. mesophytesIII. halophytes
Correct answer: A. I only
- A. I only
- B. II only
- C. I and III
- D. II and III
Explanation
The correct answer is 'I only.' Aerenchyma is a type of tissue with large air spaces that facilitates gas exchange, particularly in aquatic environments. This adaptation is common in hydrophytes, which are plants that grow in water. Mesophytes, which grow in moderate environments, and halophytes, which are adapted to saline conditions, do not typically have aerenchyma as a significant anatomical adaptation. Therefore, the presence of aerenchyma is specifically an adaptation for hydrophytes.
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About Plant Nutrition and Transport
Plants require macronutrients and micronutrients for growth, and mineral deficiencies produce recognizable symptoms. Transport involves water and minerals through xylem by transpiration pull, cohesion and adhesion, while phloem translocates sugars from sources to sinks. Root pressure and transpiration are distinct mechanisms.
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